This is from my pre-design notes and includes pin numbers)
FC DA-15 NES 48-Pin DSub EXP1 – Ground 2 - Ground
2 - Sound Output 21 – Audio Out
3 – IRQ 14 - /IRQ
4 - Port #1 (D4) 4017R.4 18 – Joypad #2 (D4)
5 - Port #1 (D3) 4017R.3 16 – Joypad #2 (D3)
6 - Port #1 (D2) 4017R.2 15 – Joypad #2 (D2)
7 - Port #1 (D1) 4017R.1 20 – Joypad #2 (D1)
8 - Port #1 (D0) 4017R.0 19 – Joypad #2 (D0)
9 - Port #1 CLK 4017R.E 11 – /OE Joypad #2
10 - Out2 4016WR.2 45 – Out2
11 - Out1 4016WR.1 44 – Out1
12 - Out0 4016WR.0 43 – Out0
13 - Port #0 (D1) 4016R.1 12 – Joypad #1 D1
14 - Port #0 CLK 4016R.E 37 – /OE Joypad #1
15 - +5VDC 1 – +5VDC (Out)
That should be all that you need.
